Best Air Purifier Buying Guide in 2021 – 8 Important Factors to Consider

best air purifier buying guide

An air purifier is a device that removes dust, pollen, bacteria, and viruses from the air in your home. There are many different types of air purifiers to choose from, including HEPA filters and UV lights. Some people also use an air purifier to control odors or make their house smell nicer.

However, buying an air purifier can be a daunting task. With so many different types and brands to choose from, you might not know where to start. But some key points will make it easier for you when picking out which one is best suited for your needs.

Also Read About: Best Air Purifiers under $300

Best Air Purifier Buying Guide – 8 Important Factors

Here are eight essential factors to look at before buying any air purifier;

1. Room size

First of all, before buying an air purifier, you should know how big your room or rooms are. While purchasing an air purifier, you should know the room size because it is the most essential factor to consider.

2. CADR Rating

The CADR or Clean Air Delivery Rate is a measure of how many cubic feet per minute of air the machine can cycle through. It is measured when in use on high-speed mode for both particulate matter and pollen removal. This number can help give you some insight into just how powerful your purifier will be. It depends on its brand model, and what types of pollutants it’s equipped to filter out.

3. Filter Type

Most air filters come in two varieties: mechanical air filters, which utilize metal mesh, or fiberglass components to trap particles. At the same time, they pass through it, and chemical air filters use some coating to destroy or immobilize particles. Most air purifiers use more than one type of filter, i.e., pre-filter, activated carbon filter panel for gas-phase filtration, etc.

4. Price

While price isn’t the most crucial factor to consider before buying the best air purifier, But it plays a major role in buying decisions. You should keep your budget as low as possible because buying an air purifier for more than you can afford will only lead to buying another one (or something else) later on.

Also Check: Best Air Purifier Under $50

5. Pollutants removal

Air purifiers help remove some air pollutants, but an air purifier removes not all types of contaminants. You should know what you want your purifier to clean up before buying an air purifier.

Regular cleaning is also vital for keeping your machine in good working condition. If the machine’s components aren’t kept clean, they won’t be able to function optimally. As with any appliance, using a quality cleaner will prolong its life and ensure a deep clean.

6. Filter life/replacement frequency

Most air purifiers use some sort of pre-filter (for trapping large particles) and activated carbon filter (to remove VOCs ). Both of which need to be replaced after a specific number of months or years depending on the machine you choose.

Some models come with ‘eco’ filters that don’t require replacement for two years (but they’re usually more expensive). Most people forget to buy these filters in advance. But it is recommended to buy these filters when buying an air purifier.

7. Energy Efficiency Rating

Power consumption is another important factor to consider before making any decision. The Consortium for Energy Efficiency (CEE) developed the energy efficiency rating system and is supported by the U.S. Department of Energy to help consumers compare product efficiencies to reduce energy consumption.

The ratings range from Level 1 (least efficient) to Level 10 (most efficient). Most air purifiers have a rating between 5 and 7. Buying an air purifier with a higher rating will save you money because it uses less electricity than lower-rated models.

8. Warranty

The warranty assures that your air purifier is free from manufacturer defects for a specific period of time. Buying an air purifier with a longer/better warranty ensures peace of mind.


So, here end the best air purifier buying guide. In the digital age, there are several options for those who want to purchase an air purifier. If you’re considering buying one and need help deciding what features should be most important to you, consider the above-mentioned points before making your final decision.